"The Time Tunnel" is a science fiction television series that aired from 1966 to 1967. The show follows two scientists, Doug Phillips and Tony Newman, who work on a top-secret government project that enables time travel. They become trapped in a time tunnel, experiencing various historical events and periods while trying to find a way back to their own time. Each episode features the duo encountering significant moments in history, such as the Titanic disaster or the American Civil War. The series combines adventure and historical drama, exploring the implications of time travel and the challenges faced by the protagonists in their quest to return home.